The victim reported the crime in 2012. Diebolt's arrest followed when she was charged with taking indecent liberties with a child.

"It's extraordinarily difficult for the police department to make an arrest in a case like this that has so much age on it," said the victim's attorney, Melissa Owen. She says the lead detective stuck with the investigation and came through with the evidence.

Owen says a recorded phone call is part of the evidence. Her client accused Diebolt of leaving him notes at school and keeping him back from PE class so they could be alone. She says the abuse happened repeatedly.

Owen says her client came forward after knowing what could happen when his own child starts to attend school. "It has been nagging at him his whole life," she said.